Air purifier



1. Air purifier

FIG. 1.1 is a perspective view showing my design;

FIG. 1.2 is a front elevational view thereof;

FIG. 1.3 is a rear elevational view thereof;

FIG. 1.4 is a right side elevational view thereof;

FIG. 1.5 is a left side elevational view thereof;

FIG. 1.6 is a top plan view thereof; and,

FIG. 1.7 is a bottom plan view thereof. 

CLAIM The ornamental design for an air purifier, as shown and described. 